TRF421X Carbon Reinforced Nylon Upper Suspension Arms (x2) Tamiya 51765  [51765]

Upper Suspension Arms for TRF421X

The Tamiya 51765 TRF421X A parts come as a pair of upper suspension arms for 1/10 scale touring car applications, supplied as two pcs for easy replacement or an upgrade path. They are designed to fit TRF421X (item 42391) and are also compatible with the standard TRF421 (item 42384), giving options for spares or alternate tuning setups with no major changes to attachment hardware.

Made from carbon reinforced nylon, these arms aim to keep a predictable flex characteristic and thermal stability, supporting consistent suspension behavior on higher-grip circuits and carpeted tracks. The material selection balances robustness with measured compliance to affect traction and steering without introducing brittle performance issues.

These arms install as a direct swap on TRF421-series chassis using existing hinge pins and fixings. When fitting, ensure hinge pins are aligned and suspension travel is clear, then verify camber and toe settings. As a tuning item, the arms can be used to refine front-end response for improved handling in grippy conditions.